| 郭曼,常庆瑞,张连民,杨云贵.关中地区不同营养状况冬小麦光谱特性初探[J].干旱地区农业研究,2006,(3):49~53 |
| 关中地区不同营养状况冬小麦光谱特性初探 |
| A study on winter wheat spectral characteristic under different nutrition conditions in Guanzhong area |
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| DOI：10.7606/j.issn.1000-7601.2006.03.10 |
| 中文关键词: 光谱反射率 叶绿素含量 营养状况 生育期 |
| 英文关键词:Spectrum reflectivity Chlorophyll content nutrition status growth stage |
| 基金项目:国家自然科学基金项目(30571527)； 西北农林科技大学科研专项项目(2030203146) |
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| 中文摘要: |
| 通过田间试验、室内分析测试,系统研究不同N、P水平冬小麦叶片的反射率、叶绿素含量,及其相互关系。结果表明:①施氮增加冬小麦叶片叶绿素作用明显,磷肥对叶绿素含量的影响不明显;②在可见光波段,随施氮量增加反射率下降,在近红外波段则相反。不同施磷水平下反射率差异不明显;③N4营养条件下可见光波段反射率拔节期<灌浆期<抽穗期,P2营养条件下可见光波段反射率灌浆期<拔节期<抽穗期;④叶绿素含量与反射率之间在施用氮肥时显著相关,在施用磷肥时其相关不显著。 |
| 英文摘要: |
| Based on field test and laboratory experiment,this article analyzed the correlation between the spectrum reflectivity and chlorophyll content of wheat leaf under different N and P levels in guanzhong area.The result indicates that: ① N fertilizer increase the chlorophyll content and P fertilizer does not.② in the visible light band,the more the N fertilizer,the less the light reflectivity of the leaves,in the infrared wave band,then the effect of N fertilzer is reversed.The effect of phosphate fertilizer is not obvious.③ under N fertilizer use condition,the visible light reflectivity of wheat leaves decreases with wheat growth;under P fertilizer use condition,the visible light reflectivity reduces at early growth stage and then increases.④ under N fertilizer use condition,the chlorophyll content and the light reflectivity are significantly correlated,and under the P fertilizer use condition,their correlation is not significant. |
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